[Errors when performing computed tomographic colonography (virtual colonoscopy) and assessing its results].

Computed tomographic colonography (CTC) is a noninvasive diagnostic method for significantly identifying clinically relevant colonic and rectal tumors. Good colonic preparation that includes laxatives or residue-free diet, as well as labelling the intestinal contents is needed to adequately interpret CTC data. However, errors in interpreting the results of CTC can be associated with not only the imperfections of large bowel preparation for examination, but also due to those of the latter and because of the anatomic features of the colon.